Patents by Inventor Junetsu Akiyama

Junetsu Akiyama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for determining the degree of oxidation of an oxide coating
    Patent number: 4957370
    Abstract: A method and apparatus determines the thickness of a copper oxide coating of an object by measuring the quantity of light reflected from the object in at least two wavelength zones, and then determining a value for a relationship between those quantities, for example, the ratio or difference of those quantities. The value is then compared to a predetermined, regular correspondence between such values and copper oxide thicknesses to determine the object's copper oxide thickness.
    Type: Grant
    Filed: September 6, 1989
    Date of Patent: September 18, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mamoru Tominaga, Leo Mori, Junetsu Akiyama
  • Fluorescent lamp
    Patent number: 4199707
    Abstract: A fluorescent lamp which comprises a vacuum-tight envelope provided with electrodes between which discharge takes place during the operation of said fluorescent lamp.
    Type: Grant
    Filed: August 29, 1978
    Date of Patent: April 22, 1980
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Junetsu Akiyama, Takayoshi Fuchida, Akira Taya, Kazunori Nagafuchi, Kohtaro Kohmoto, Tomohiko Kobuya